The UFC decided to push Matt Hamill to the main card for UFC 152 instead of announcing a new fight to replace the cancelled Rory MacDonald-BJ Penn bout.
Hamill, who is coming out of retirement, will face Vladimir Matyushenko on September 22 from Toronto.
The main event boasts Joseph Benavidez and Demetrious Johnson hooking up to determine the first-ever UFC flyweight champion.
In the co-main event, middleweight contenders Brian Stann and Michael Bisping will square off.
The two remaining pay-per-view main card fights are Evan Dunham vs. T.J. Grant, and Charles Oliveira vs. Cub Swanson.
Hamill announced his retirement last year after a second straight loss inside the Octagon. He was expected to face Roger Hollett, but Hollet was forced out of the fight.
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